Chain grate stoker



Nov. 3, 1931.

eeeeeeeeeeee t l M' 4 ATTORNEYS Nov. 3, 1931. c. R. sADLr-:R ET AL1,830,338

CHAIN GRATE STOKER Filed Oct. 5, 1926 4 Sheets-Sheet 2 t y Z IATTORNEYJ` C. R. sADLER ET AL 1,830,338

CHAIN GRATE STOKER Nov.

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M, ATTORNEYS Nov. 3, 1931. c. R. sADLER ET AL CHAIN GRATE STOKER 4Sheets-Sheet 4 |.|.I lllllrllfl Filed Oct. 5, 1926 N\ NQ.

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,ffd M ATTORNEYS Y Patented Nov. 13, 1.9931A PATENT g orf-icuiicommunsn. SDLER. or BARBERTON, omo, ANDHOWARD .'r. xnnza, oF WEs'rriEnn,NEW` .TERsErAssIGNoRsTo rrrEBABoocxa WILcox COMPANY, .or BAYONNE, NEWJnnsnxnconronnrroN or NEWJERSEY f` CHAIN GRATEfsToxEn frApplicat-icnIled October 5, 1926.k Serial No. 139,588.V

22of Fig. 1 with the'centralportion of the stoker broken away ;"Fig.'3yis an enlarged section on the'line 3+?) oFig. 2; Fig. 4isan i enlargedsection on the Vline4-4 ofFig. 2;

, Fig. 5is a section'on'the line 5%5l of Fig. l, 415'and Fig` 6/ is anenlarged sectioncn the line (i1-6.0i Fig. 1.v f 1 y y. s

Like reference ycharacters indicate like s parts in the diefrent'views.

yIn Fig. 1, the'illustrativev embodiment has rgojthejusual drivingshafty 10 and drivenshaifty 11 spaced apart and Vprovided withspro'cketwheels 12 engaging the'chain 13,'this lchain Y being made up of'links,in the usual manner,

to orm'the s grate. The shaft l1() will be driven in the usualmannertocarry-the upper run of the chain '13"tothe left in` Fig. 1.

' Vln the form illustrated, thev space between y the upper and lowerruns 4of the chain' isy divided into compartments by cross 4beamsor'girders 14 provided with seals at the` topand so as to prevent theready flowv ofk air from V'one compartment to another', thissealing'arrangement being no part of our 'present 1nvention and,therefore, .requiring no further description. y, 1 Y. The side walls 15and 16 oi the furnace Vchamber are supported on metallic supportingstructures, which, inl`the `form illustrated,` also embody blast boxesby whichair may be supplied in regulated quantities'to vthesevleral'ccmpartments formed by the Abeams or lgirders 14 and theirseals. illustrated, one of` these supporting structures isl fixed andtheother has a portion thereof which'is movable laterally, the fixedl Vsidebeing shown in Fig. 3 and the movable orfexpansion yside shown inFig.`4.

' Referring to the part shown in Fig. 3, the blast box structure is madeup of outside pliedthereto; Fig. 2is a section onth'e line plates "17and inside plates 18 connected to transverse castings 19, the latteracting as partitlons to divide the blast box longitudinallyintofseparate compartments, the openy.

ing 2O in each casting connecting the air supply Witheach of thesecompartments. The top of the' inside plate 18 is spaced from the angle21to provide an opening from the blast box' compartment into the spacebetweenthe .n

upper and llower ru'sof thechain grate: 13. Dampers 2,2 controladmission of airv Jfrom the lower part of the blastbox intothe'sepayrate compartments thereof. y

The blast box structure on the oppositeor expansion side is also madeupoi' outside plates 23 connected to transverse castings 24 which, inturn, are arranged in a manner i similar to that at the fixed side.Openings 25 are formed inV each of these transverse castingsand dampers26' control the supply fromr the source of the air blast into thecompartments formed by the transversecastings.

At the inner side of this'blast Vbox struci ture on the expansion sideare plates 27l which may be comparatively thin and light, and an angle28, the adjacent edges of these two parts being spaced to provide anopening'from'each air blast compartment into the 'space between theupper and the lower runs l u 'of the chaingrate. the bottom' thereofcontacting with the cham Connected to the' plate 29 forming ythe top ofthe blastbox'structure is a ledge plate 30, the wall 16 resting on thisledgeplate and the plate 29. On the horizontal leg of the angle 31.forming a part of the blast box structure rests a movable plate 32having at its top an angle 33 to which is connected a grate side guide34 which, in turn, has its topl in slidingengagement with'the bottom ofthe ledgeA plate 30. Vertical angles'V 32 connect the plate 32 to theangley 33 and In the rform i guid 34; I

On the opposite or fixed side (Fig. 3) there is also a ledge yplate 35connected to the top platef36 of the blast box structure and 'a chainside guide 37, also connected iixedly to the blast box structure. f y

The beams or girders 14 each have. one

Vend connected bythe angles 38 to a transy verse casting 19 andsimilarly below the Vlower run of' the grate are beams 39 connected byangles 40 to the plates 18, the bolts holding the angles 40V to thebeams 39 extending through horizontal slots in the beams 39 i ach of thebeams 14 is connected to theVV movable Wall made up of the'menlbers 32,l

32, 33 and 34 bv theangles 41l and the beams `39k arealso connected 'to.the lplate 32 by angles 40-.with' the same bolt and slot ar-w rangementas at the opposite ends of these.

beams.

Thismovable wall structure has openings .therein corresponding to theopenings in the` blast box compartment formed by the transverselcastings 24 and ra duct .43 extends through each of these two` openingsto jiorm `alconduitfrom the blast box compartment to the space betweenthe grates. In the form shown, the duct 43 is attached to the movablewall structure and is freeY to slide horizontally in aslip Ajointconstruction supported by vthe castings Yso as to permit' horizontalmotion of the 'I duct 143 `'without breaking the joint: In the formillustrated, this slip. joint constructionis made up yof apart 44extending over the top and down the sides, of the duct 43, thismember-@being attachedv to angle 28 by the flange; 44. A spacer l4(15kholds a liner 45 spacedfrom theinside of themember 44, andthe end ofduct 43 slides in this space.l Similarly' the plate 27 is bent-:out-

wardlyat 47 "and is provided with an angle 48 to form a space betweenone of.' its legs and the part 47 inY which the bottom of duct -43 canslide. Y i

Qn the beams. 39is a slide plate-49 on vwhioh the'lower run .of thechainis supported and the crossbeams or'girders 14 may be provided .withlongitudinal beams Oconnected between'the beams or girders 14.

With the arrangement described,'it will be obvious that the' members 34and 3T form Vsideguides for the upper-run of thechain and similarly theplates 1S and .3Q-form side guides vfor vthe ylower run ofV the chaiulBethe Vfixed blast box and the other to the movable wall. lThe beams orgirders 39 will also partake of this expansion and contraction. butsince they may not expand and contract to the same degree as the girders14, thebolt and slot construction is provided. The links of the chain 13are provided with the usual such` bearings.

clearance between them, when Erst erected, so that, if the chain and itssupport-ing' parts expand onlythe usual amount,fthe position 1 of themovable wallk of Fig. 4 will not'be fected. It, however, the chainandthe beams or girders 14 are heatedinore than the usual clearance Willtolerate', then the expansion of the beams 14 will move themovable'vwall to the right in F ig. 4 to provide additionalclearanceand, at thesameptime, will maintain the side guides forthechain in correct operative position. In otherwords, by our arrangement,we have provided means by which binding of the chain between the side fguides will be prevented even when excessive expansion andr contractiontakes place, and

`this without, `at any time, having-more than Y. the Vusual. 'clearancebetween the links p crosswise of the grate. j j v Theduct 43 and itsslip jointr is provided` so that motion of the movable wall portion ofFig. 4 will not disturb the connection between the blast box and thespace between the upper and lower runs ofthe chain. j

It will be understood that the Vduct 43 may havejone end kconnectedixedly yto the blast boxr and the other end movable in the movable wall.i A I j It will also be understood that while wev have shown ourarrangement injconnection with a forced blast grate, manyk of thefeatures ogour invention maybe 'used where natural drarty is used orwhere the air is supplied-from beneatlrthe lowerrun of the chain.

As shown in Figs. ,5 and 6, the bearings for the shafts 10 and 11 whichcome at the fixed side of the construction lare mounted infixedvbearings connected to such'structure'with collars orthe like to preventend motion of the shafts'in suchbearings.` Preterably. the driving-wormgear `51is connected totheshait 10 atthis side; The sprockets12`are vviixedly connected to their respective shafts-and when suchshafts expand with the heat, lthesesprockets are also, carried to the;left-of Figs. 5 and 6. To permit this longitudinalV motion of theshaftsfdue to the expansion, -we arrange thebearings atthe letthand endoi the shafts in Figsand (which are on the expansion side ofvthestructure) so'that'the shafts may move endwisethrough With thearrangement described it lwill be noted that whenthe entire `grate andits supporting and drivingstructure is unduly heated, the vgrate itself,the

driving sprockets for it and theshafts for such sprocketscan all move tothe left in .Figs. 5'and 6 when thus expanded', carrying withthemthefchain side guides 32 and 34.v

The plate 32 forming thel lower side guide be caught on the ends of thisguide. To hold the movable Ywall structure against longitudinal motionin the direction of themotion` soV l yofthe Vchain grate, we provide thesliprjointv shown at the right ofFig. 2, a verticaly memfv structure'extending intoy the space formed .l between the. angles '55, 56connected to the lfixed part of the blast boxl Structure. It will *be*obvious'that this arrangement will prevent the pull of theV chain movingthe movf @able wall structure longitudinally while, Aat vthe 'same time,permitting ,the wall structurev fto move toward and away from the fixedpor-v tion. y A

We claim: v 1. In combination, a cha-in grate stoker having upper andlowerruns, side guides for the opposite ,sides of,v the upper run, a

v fixed supporton one side of the Stoker to which thel guide on thatside is secured, `a'` second support on theother side of the stoker 'Ytofwhich said'other guide is secured, across beam connecting saidsupports, and means movably supporting said Second support *25. Vwherebyit may move laterally with respect tothe Stoker upon expansionv orcontraction of said beam.'

2. In combination, a chain grate stoker having upper and lower runs,fixed members on v both sides thereof, side guides for the oppositesides of said upper run .of'thestoken means including crossybeamsconnecting the guides on'said opposite sides, and means securingthe 3 guideon one side to the fixed member'on that side, the guide onthe other side and the fixed member on thatside having slidingengagement with each other.

,n other guide is secured, a cross beam connect-I 3. Incombination achain rate Stoker hava l n ing upper and lowerruns, side guides for the4opposite-.sides of the upper run, a fixed support on one Side of theStoker to `which the guide on that side is secured, a second support onthe other side of the stoker to which said ing Vsaid supports, meansmovably supporting said second support whereby it may move laterallywith respect tothe stoker upon ex- .pansion or contractionv of saidbeam, and

means preventing movement of said second support longitudinally of thestoker.

4c. In combination, a chain grate stoker having upper and lowerruns, afixed blast box alongone side thereof, a' side guide for Y the upper runof the stoker on the same side as the blast box, means movablysupporting saidfguide to permit movement toward and from the blastbox,and a duct connecting vthe box with the space between said runssaidv'Stoker upon expansion or contraction of said beam, a fixed blast boxalong one side of the Stoker, and a duct connecting the blast box withthe space between said runs, said duct.

being secured to said second support and having an expansion joint withthe box.

6. In combination, a chain grate stoker having upper and lower runs,fixed members on both sides thereof, side guides for the opposite sidesof said upper run of the Stoker, cross beams connecting the guides onsaid op posite sides, means securing the guide on one side to thefixedmemberon that side, means forming a sliding joint between the guideon the other side andthe fixed member on that side, Shafts at oppositeends of the Stoker and adapted to operate the same, fixed bearings forsaid shafts on one sideV of the grate, and means on the other sideoftheV grate supporting the other ends of the shafts but permity tingmovement thereof longitudinally of the shafts.

7. In combination, a chain grate Stoker having upper and lower runs, aixed blast vbox along one side thereof, a side guide for,

expansibly connecting said duct to said support and to said box.

8. In comb'nation, a chain grate stoker having upperand lower runs, sideguides for the opposite sides of the upper run, a fixed support on oneside of the Stoker to which the guide on that side is secured, a secondSupport on the other side of the Stoker to which said other guide issecured,a cross beam connecting said supports, means Vmo-vablysupporting said second support whereby it may move laterally-withrespect to the stoker upon expansion or contraction of Said beam, afixed blast box along one side of the Stoker, a duct connectingthe blastbox with theispace between said runs, and means expansibly connectingsaid duct to said Second 'support and to said box.

' CORNELIUS R. SADLER.

HOI/VARI) J. KERR.

'- duct being Secured to said support andhav- Yco.

-. the opposite sidesof the upper run, a fixed `ing an expansion jointwith said box, r

5. In combination, a chain grate Stoker` having upperand lower runs,side 'guides for support on'one Side of the Stoker to which the guide onthat Side is Secured, a second support onthe other sideof the ,Stoker towhich

